we can put it anywhere that is short of electricity from the state grid .for example : the campering outside at night. 1,Open the case and put it in the sun to charge the battery. It is charging, if the charge lamp is red.2,If have to use AC, open the AC switch and insert the load into AC socket; the AC indicator light will be red.3,If have to use DC, open the DC switch and insert the load into ...